Oscillating joint



Dec. 4, 1928.

1,693,981 H. D. GEYER OSCILLATING JOINT Filed Oct. 16. 1926 Patented Dec. 4, 1928.

UNITED STATES v 1 was PATENT OFFICE.

I HARVEY D.-GEYER, OF DAYTON, OH IO, ASSIGNOB TO THE INLAND MANUFACTURING COMPANY, OF DAYTON, OHIO, A CORPORATION OF DELAWARE.

OSCILLATING JOINT.

Application filed 0ctobe1 16,'1926. SerialNo 142,117.

' This invention relates to pivot joints and has particular reference to vehicle spring shackles and the pivot joints in various link connections in automobileconstruction.

. All object of this invention is to provide an elastic rubber bushing element wherein the rubber material is put under an initial compression whereby ifis held in non-slipping engagement with its contacting metal parts and whereb the amount of undesirable distortion of t reduced.

Another object 'is to provide an improved e rubber mate-rial under load is method of putting the elastic rubber material under initial compression.

Further objects and advantages of the pres ent invention will be apparent from the following description, reference being had to the accompanying drawin' s, wherein a preferred form of embodiment o the present invention is clearly shown.

. In the drawings: v

Fig. 1 is a side elevationof the front end of the front spring of an automobile, connected to the chassis frame by a pivot shackle built according to this invention.

Fig. 2 is a transverse section taken on line 2'-2 of Fig. 1.

Fig. 3 is a detail viewshowing the rubber disks inserted over the inner metal sleeve with the outer metal sleeve removed therefrom and illustrates the various positions the rubber disks tendto assume.

Similar reference characters refer to similar parts throughout the several views."

, turned front end of the automobile chassis frame which is shown as the ordinary channel construction. 11 is a forged fitting suitably fixed to the end of channel by means of rivets or bolts (not shown) This fitting 11 is provided with two downwardly turned cars 12 spaced apart as clearly shown in Fig. 15 is formed on the long leaf 2. A spring eye 16 of the front spring 17 The flexible-bushing element 20 is held fixed at its outer pe riphery within the spring eye '15.. The shackle bolt 21 passes through the center of bushing element 20 and is fixed in non-rotatable relationtheretov by the serrations 22 on bolt 21. It will now be clear that all pivotal movement of the spring eye relative to the fitting 11 will be taken up by internal distortion within the bushing element 20, l

This bushing element 20 will now be'deouter metal sleeve32 in such a way that these eccentric holes 31 are angularly spaced uni-.- formly around the axis of sleeve 32, each of the holes 31 being sufliciently large in diameterto overlap and include the axis of sleeve 32. A suitable tool such as a tapered pin is then inserted through the non-aligned holes 31 to bring them into suificient alignment by distortion of the rubber to permit theinsertion of the inner metal sleeve'33 through the holes 31. Preferably this inner sleeve 33, after'being inserted as above described, has its ends flared out to form the annular flanges 34. The outer'sleeve 32 is also preferably provided with in-turned annular flanges 35 at each end thereof to aid in retaining the disks 30 in place. The inner surface ofthe inner sleeve 33 has serrations or flutes 36 (see Fig. 3) which cooperate with the serrations 22 on bolt 21 to aid in fixing said sleeve 33 non-rotatably upon bolt 21. I

This'bushin'g element 20, made as above described, is pressed within the sprin eye15 and is held therein by the pressed t. The

spring eye with element 20 therein is then inserted between? the ears 12 of fitting 11 and the metal washers 23 and 24 slipped inu) place and the shackle bolt 21 inserted. .Then by setting up nut 25 very tight the inner sleeve 33 of thebushing element 20 willbe ri 'dly' clamped in place between the ears 12%) a slight springing of said ears 12 and wil be Numeral 10 designates the downwardly positively held against rotation by the corre- J sponding internal serrations on said sleeve -33 and bolt 21. ,The bolt 21 is held rigid with the ears. 12 by settingup nut 25 tightly upon a suitable lock washer.

tingll will all be. taken up by the internal-- elastic distortion within the rubber disks 30. The eccentricity of the holes 31 in disks necessitates compression of the rubber on the wide side of each disk when holes 31 are forced into alignment by the insertion-of the inner sleeve 33. as described above. These 1' 105 l in In operation, the oscillatory pivotal move 4 ment of the spring eye 15 relativeto the fitshackle bolt. This invention provides a simple and eflicient method of making an elastic bushing element with the elastic material low. I

- ing within the scope of the claims which fol- What is claimed is as follows 7 1. In combination with the spring and frame of a vehicle, a shackle comprising: an eye member rigid with the sprin ,a shackle bolt through said eye and rigi with said frame, and a flexible rubber bushing ar ranged between said eye and bolt, said rubber bushing comprising a plurality of rubber members-arranged side by side upon said bolt and confined in, place under an initial compression; 1

2. In a pivot joint between'two relatively movable parts, in combination, an eye member rigid with one of saidparts, a pivot pin inserted through said eye and rigid with the other of said parts, and a flexible rubber bushing arranged between said ,eye and pin and held in non-slipping relation thereto, said bushing comprising: a pluralit of-flexible rubber disksoriginally forme with ecf 3. In a'pivot movable parts, in combination, an eye member rigid with one of said parts,

centric apertures therethrough but retained in place under an initial distortion which forces said apertures to substantially concentric position, V I

' joint between two'relatively a pivot pin inserted through said eye and rigid with the other of, said parts, and a flexible.rubber bushin metal s ells and arranged between saideye and pin and held in non-slipping relation thereto, said bushing comprising: a plurality retained within outer and inner' of flexible rubber disks originally formed with eccentric apertures therethrough but retained in place under an initial distortion which forces said apertures to substantially concentric position.

4. In a pivot joint, a flexible bushing element co'mprisingi outer and inner metal' sleeves, a plurality of flexible rubber disks each having 'an or ginally eccentric aperture therein and 7 arranged within said outer sleeve, said inner sleeve being inserted through said apertures holdin them in alignment, whereby the rubber 0 said bushing is put under "an initial compression.

5. In a pivot joint, a flexible bushing element comprising: outer and inner metal sleeves, a plurality of flexible rubber disks each having an or ginally eccentric'aperture therein and arranged within said outer sleeve so that said apertures are substantiall ing said rubber disks compressed into substantial alignment;

7. In a pivot joint, :1 flexible bushing element comprisln an inner metal sleeve, a

plurality of flexible rubber disks having ec-' centric apertures therein insertedover said ing said rubber disks compressed into sub- 'stantial alignment, said outer sleeve having in-turned annular flan as at each end for retaining said rubber dis 5 in place. I

In testimony whereof I hereto aflix my signature.

f HARVEY D. 'GEYER.

inner sleeve, and an outer-metal sleeve hold- 

